A storm system with an “unusual” path is forecast to move west toward the Central Coast overnight Thursday, bringing a slight chance of rain and isolated thunderstorms to the Bay Area, according to the National Weather Service.

The system, moving west from Nevada, will bring a 15 to 20 percent chance of rain to most Bay Area cities, according to the weather service. The best chances of rain will occur farther south in San Benito and Monterey counties.

The next weather system is going to take an unusual track spreading rain chances from the Sierra WESTWARD towards the Central Coast later Thurs night into Friday. Isolated t-storms will be psbl as well. The image shows the best chances will be over San Benito and Monterey cnty pic.twitter.com/j8CgnmCUR5

“We’re not expecting widespread rainfall from this system,” said Roger Gass, a meteorologist with the weather service.

Goss said the wettest areas along the Central Coast may receive about one-tenth of an inch.

Thursday is expected to be dry for most of the day, with the system approaching in the afternoon or evening, according to the weather service. The system will drop into Southern California this weekend, allowing for “dry and mild weather” in the Bay Area through early next week.

Mark Gomez has worked for the Mercury News since 1992, including the past ten years as a reporter on the breaking news/public safety team. He is a South Bay native and graduate of San Jose State University.